USN SRR-13 HF Receiver Demonstration
HTML-код
- Опубликовано: 13 сен 2024
- Here is a RCA SRR-13/A HF receiver which covers 2-32M/C's. Made by RCA in the 1950's for the US NAVY. Very well made internally, uses miniature 'wired' in valves (tubes) which are mounted in small removable modules which can be removed for refitting new valves. Lovely radio, replaced all valves and realigned, works wonderfully and 'feels' great tuning around the hf bands. Has a very cool frequency readout which is projected onto a translucent display panel. Heavy but fun table top radio.
![Baby Kia - GLOVES & DRACS (BLACK AF1s) [Official Music Video]](http://i.ytimg.com/vi/ajm8LeB0qQk/mqdefault.jpg)
What a lovely radio, I have the exact Same one but its all original. Wish I could find some information on it because I'm sure it needs work. But it does come work I can receive AM690 here in the states
Hi Mick, I own one too and will try to have it work. It didn't last half century so... 🙂 Renaud F5ZR
Thanks Tom, I was looking at these for some time. finally picked on up. As mentioned all values were replace as well as a lot of the mica molds. Internally they are very modular and very well laid out, I should have taken some internal pictures. Pete
Hello, Peter: This is Ken, W7EKB. I have worked on the SRR-11/12/13 receivers both in the 1970s and lately. There is one thing you can do with those to markedly reduce the internally generated heat, and concomitantly, the noise: add a properly bypassed 56 K resistor in each screen-voltage feed in order to reduce the screen voltage to a far more "reasonable" value. RCA engineers arranged the circuitry so that the screen voltage on many stages was equal to the plate voltage. This is unnecessary and contributes to heat and noise. Also, the detector for CW and SSB is, surprisingly, a real product-detector, although the manual doesn't call it that. Nice video, by the way. Thank you, and vy 73, Ken W7EKB
+Kieran Gordon Hi Kieran, many thanks for the tip, Ill take a look and give it a go. all the best. BTW i have a SRR11 (VLF) set which works reasonably well, went through it and fixed/realigned but It has no AGC (as standard) and relys on manual adjustment of RF/IF and AF to get it just right on any particular signal, there is also a fixed noise limiter in cct which doesn't help the situation.. I was surprised how 'touchy' it is but may be that is normal?? wonder what your experience is with the version this set.
I was a electronic tech. on a US Destroyer in the 1950s and we had about 15 of these receivers. I think that RCA designed this model to mainly burn up tubes. I had one tech. hose main job was to replace tubes in these damm things. Performance was OK but if you are going to use this radio, I recommend that you install two or more fans in the covers.
Very interesting radio. Thanks for sharing.
Tom
I had a SRR-11 as a very young Ham Many years ago, it has a bad cap in the audio out and I had no idea what to do with it. SO a ham with much more experience than I was glad to take it away, never saw it again. Was a fun receiver as its low freq. went down to 10,000 hertz, Kind of low. W4GSM
The technology has evolved a lot: a Malachita receiver with the MSi001 chip or a Funcube pro +
surely they have better performance which is huge apparatus
FYI Walt Hutchens in 1991 wrote an article on this rec which includes info on reducing audio distortion and also improving the HFO tracking ( freq display ). Very worthwhile, I think.
+kargocult thanks for the pointer, I haven't seen this article, just had a look at radio electric but there is no copy available online for purchase, Ill try sending them an email. I did read some of his comments on another site and have to agree the radio has a very impressive mechanical layout and modular design. The audio is just about acceptable but could do with improving....
+Peter Stanford The article addresses the issue of the audio distortion at high AM modulation levels. I just posted a note about the article to a couple online mil radio groups. I think I will be contributing the article to Nick England's Navy Radio website so it should be available there in a month or two from now ( 4-2016 ).
+kargocult OK thanks for that ill keep an eye out for it. Its has been hard to find much info on these radios. I do have the manuals but any improvements or changes have been hard to track down. BTW do you have any experience with the VLF SRR-11?
I have an SRR-13 and a couple Collins R390A receiver. All three I use a 600ohm to 4 ohm output transformer for audio but I'm soldering in new tubes now and aligning it.I wish it had the broadcast and 160m band but no biggie.
Rumor has it as soon as the R-390 and R-390A started showing up onboard ship, the SRR radios mysteriously disappeared as they were being tossed overboard to favor the newer Collins units.
Sorry no se oyó el receptor, solo el locutor
Great looking radio, is it still working well? Love the detail you put into making this video, thanks for posting !!!
Hi Tom, thanks for the nice comment. Yes the RX still works well. Used it a couple of months ago. I planning on doing a mod sometime to reduce the drive on the if strip.
@@vk4gxc Absolutely! And sounds good, glad to heart that it is still running! I'm currently working on getting one of these radios back online myself, really glad to see what kind of performance they are capable of after having been gone through! How many of the original caps did you end up replacing? I've heard mixed things about the Micamold caps, so wondering if just recapping the whole set might be the best option...thanks!!!
Hi Tom, I am trying to recall some of the issues i had, The mica moulds were an issue. I seem to recall replacing all of them in the IF strip transformers. This is from memory but I think there are 2 in each transformer, most are the same value so I just got a few of ebay. There was one which was definityly bad, that made me change all and after this all the IF transformers lined up beautifully. Cant remember much else, but I did replace just about all the tubes in it and probably a few out of value resistors. The front end is a nice layout and it tuned up well too. There is a mod to fit resistors to the screens (its on this thread I think), its been on my to do list a long time. I would agree it will reduce heating, probably lenghtnining tube life and bring down the IF gain which in my opinion is a bit high. One other area I spent time on was the audio amplifier and detector. I was never really happy with the audio, its not bad, ( it could be due to the high IF gain/AVC control), I even swapped out the whole audio module but was basically the same. I also have a SSR-11 here as well (VLF) so can swapp modules. They make a nice pair. Loads of EX USN guys hate these things but I kind of like them, but guess my life doesnt depend on them!.
@@vk4gxc Sounds good on all counts, thanks for that! I do remember reading about the resistor addition, not really sure why they would have designed things with the voltage being that high, definitely unusual for RCA. And I've heard mixed reviews also, I do like the overall appearance of the set, and it sounds like it would be a fine piece to work on. Thanks for all the information, much appreciated!
@@thejollyroger1945 No worry Tom, I like the genral look of the set too, it was quiet futuristic for the time somewhere between the SP600 and the R390 and smaller, RCA expended a lot of effort to modularise the unit, its quite a mechanical work of art. Even some rack and pinion work in there! I think that the screens were tied to the anodes as it was a recognised solution at the time, It may have helped with linearity (Maybe) but I think I will try the screen resistor in the future, its alway reversible. Good luck with your restoration!! Pete
Multiple detectors from one antenna
Megacycles))))
Perfect! Otimo receiver.
Seeking diagram receiver Elektromekano M 97.
Can you help me?
please.